LOCK-FIT Installation Instructions

LOCK-FIT fittings are supplied assembled and finger tight. Disassembly before use can allow the entry of dirt or other particles.

1. Insert the tubing into the LOCK-FIT fitting.
Check that the tube rests firmly on the fitting shoulder and that the nut is finger tight. At this point it is recommended that a scribe mark be drawn on the hex of the nut extending onto the fitting body. This mark will serve as an indicator for the starting point and proper pull-up.

2 .Tighten the nut.
1-1/4 turns of the nut are required for 1/4" (6 mm) and higher (see Fig. A).
3/4 turn of the nut is required for 3/16" (4 mm) and lower (see Fig. B).

Reassembly Instructions

LOCK-FIT connections may be disconnected and remade repeatedly, without loss of leaktight seal.
1. Before disconnecting, mark the position of the nut inrelation to the fitting body.
2. To reassemble, use a wrench to tighten nut to original position.
3. Tighten slightly with wrench until a slight rise in torque is felt.

Tube Cutting

Two different methods can be used to cut tubes:
1. Tube cutter
2. Hacksaw

Tube Cutter

To attain a leak free connection, the tubing must be cut squarely. A good quality tube cutter with the appropriate blade for the tubing material is recommended.
Do not try to reduce the time of cutting by taking deep cuts with each turn of the cutter. This will work harden the tube. The end of the tube must be deburred to avoid damage to the fitting and to ensure that the tube reaches the bottom of the fitting.

Hacksaw Cutting

In order to cut the tube with a hacksaw and get square ends, the tube must be cut with guide blocks. This method of cutting necessitates deburring of the tube ends.